IMAGE ACQUISITION COMPOUND LENS AND APPLICATION THEREOF
Disclosed are an image acquisition compound lens and application thereof. The image acquisition compound lens includes a camera lens and two or more convex mirrors having a same shape, wherein, the camera lens has a predetermined front field of view; the two or more convex mirrors having the same shape are symmetrically disposed with respect to an optical axis (c) of the camera lens within the predetermined front field of view of the camera lens, and configured to reflect partial views beside and behind the camera lens to the camera lens respectively; a mirror gap is formed between the convex mirrors symmetrically disposed, allowing the mirror lens to directly acquire views within a first front field of view right in front of the mirror lens.
This application claims the priority of Chinese Patent Application No. 201610504068.2, filed on Jul. 1, 2016, entitled “Omnidirectional Image Acquisition Compound Lens”, the disclosure of which is hereby incorporated by reference in its entirety.
FIELD OF TECHNOLOGYThis application relates to the field of an optical lens, in particular to an image acquisition compound lens and application thereof.
BACKGROUNDAt present, a typical panoramic lens usually expands the range of view angle by means of a curved mirror, and a conventional camera is adopted to obtain a range of vision of the surrounding views. For example, Chinese Patent Application Publication No. CN1975554A describes a panoramic vision system based on a hyperbolic viewfinder, aiming to improve the curved mirror mentioned above, reduce the complexity and difficulty of the system design and obtain a wider applicability. With the development of image processing electronic technology (especially computer graphics), a technique of obtaining a normal perspective panoramic effect by superimposing and correcting the acquired images is also disclosed, for example, Chinese Patent Application Publication No. CN104835117A describes a method of generating spherical panorama in an overlapping manner. The method includes performing pixel fusion based on an image fusion principle, numerically calculating the overlapping regions of two hemisphere spaces, quantitatively calculating the relative positions of pixel points according to the positional relationship of the overlapping regions, and generating a spherical panorama by mapping the points on the spherical space to the spherical panorama according to the spherical panorama generation principle.
As can be seen from the two typical panoramic image acquisition technologies mentioned above, although the former has a simple structure, it cannot obtain the omnidirectional vision covering the full spherical surface in the true sense, but can only obtain the surrounding views within the reflection range of the curved mirror since the image is acquired by the reflection of the curved mirror disposed right above the lens; the latter requires complex calculation to obtain virtual images, wherein an image processing device needs to be incorporated, which results in the complicated structure and high cost, moreover, there is a probability that the virtual images obtained after data processing still cannot be used as a judicial evidence, for example, it may be troublesome in occasions which require judicial forensics, such as vehicle insurance claims, accident monitoring, and so on.
SUMMARYEmbodiments of the present disclosure are to provide an image acquisition compound lens and an application thereof, to overcome the defects of the above-mentioned conventional structures and methods, and obtain an approximate spherical panorama than surrounding views, through a simple optical direct imaging structure, for use in the omnidirectional image acquisition.
An image acquisition compound lens includes a camera lens and a plurality of convex mirrors having a same shape, wherein, the camera lens has a predetermined optical view angle and a predetermined front field of view determined according to the optical view angle; the plurality of convex mirrors having the same shape are symmetrically disposed within the predetermined front field of view of the camera lens with respect to an optical axis c of the camera lens, and configured to reflect partial views beside and behind the camera lens to the camera lens respectively; a mirror gap is formed between the convex mirrors symmetrically disposed, allowing the mirror lens to directly acquire views within a first front field of view right in front of the mirror lens.
In an embodiment, the number of the convex mirrors is two.
In an embodiment, the convex mirror is a spherical mirror.
In an embodiment, the convex mirror is a parabolic mirror.
In an embodiment, the convex mirror is a hyperbolic mirror.
In an embodiment, an overlapping region is formed between fields of view reflected by adjacent convex mirrors.
In an embodiment, the camera lens is a zoom lens.
In an embodiment, the image acquisition compound lens further includes an image electronic processing device connected to the camera lens.
In an embodiment, the convex mirror has a sector structure with a central angle of 180° or more.
In an embodiment, the plurality of convex mirrors having the same shape collectively reflect all the views beside and behind the camera lens to the camera lens.
Use of the image acquisition compound lens in a vehicle is disclosed.
According to the present application, by replacing a conventional convex mirror disposed in front of a camera lens with a plurality of convex mirrors arranged symmetrically, the field of view right in front of the camera lens cannot be obstructed; an omnidirectional field of surrounding views will be acquired without any omission by an appropriate overlapping of the fields of view of the plurality of convex mirrors; and the camera lens can cover or even include the majority of the spherical fields of view behind the camera lens to the utmost extent by selecting the appropriate focal length, view angle, aperture of the camera lens and by properly adjusting the curvature, tilt angle, position and mirror aperture of the plurality of convex mirrors. Thereby, images for views within the first front field of view in the front can be directly photographed by the camera lens, while the surrounding views and partial views behind the camera lens can be acquired through the convex mirrors, so that an approximate full coverage of the spherical field of view is achieved. Since the raw images are directly acquired by the geometric optical imaging system, and the system is capable of simultaneously, synchronously, two-way photographing and recording the information, causes, processes and results of an event and the two (multi) parties associated with the event, it is especially beneficial to occasions such as insurance claims, accident identification and where judicial forensics are required, and so on.
In order to make the content of the present application easier to understand, the present application will be further described in detail below in accordance with the embodiments and the accompanying drawings of the present application:
Description of reference numerals: camera lens 1, first front field of view 10, convex mirror 2, equivalent convex mirror 20, cutting line 21, transparent cover 3, mirror gap 30, predetermined front field of view 40, camera lens node O, optical axis c of a camera lens.
DETAILED DESCRIPTION OF EMBODIMENTSThe embodiments of the present application will be further described in detail below with reference to the accompanying drawings.
Referring to
In summary, in term of the framing space, with the convex mirrors 2 provided, the camera lens 1 can simultaneously obtain the first front field of view 10 of the lens (the above smaller half of the spherical space, within the predetermined front field of view 40) and the framing range of the below larger half of the spherical space through reflection.
According to
According to
Claims
1. An image acquisition compound lens, comprising:
- a plurality of camera lens and a plurality of convex mirrors having a same shape, wherein the plurality of camera lens have a predetermined optical view angle and a predetermined front field of view determined according to an optical view angle;
- the plurality of convex mirrors having the same shape are symmetrically disposed within the predetermined front field of view of the plurality of camera lens with respect to an optical axis c of the plurality of camera lens, and configured to reflect partial views beside and behind the plurality of camera lens to the plurality of camera lens respectively;
- a mirror gap is formed between the convex mirrors symmetrically disposed, wherein the mirror lens are configured to directly acquire views within a first front field of view right in front of the mirror lens.
2. The image acquisition compound lens according to claim 1, wherein the number of the convex mirrors is two.
3. The image acquisition compound lens according to claim 1, wherein the convex mirror is one or more of: a spherical mirror, a parabolic mirror, and a hyperbolic mirror.
4. The image acquisition compound lens according to claim 1, wherein an overlapping region is formed between fields of view reflected by adjacent convex mirrors.
5. The image acquisition compound lens according to claim 1, wherein the plurality of camera lens are zoom lens.
6. The image acquisition compound lens according to claim 1, further comprising an image electronic processing device connected to the plurality of camera lens.
7. The image acquisition compound lens according to claim 1, wherein the convex mirror has a sector structure with a central angle of 180° or more.
8. The image acquisition compound lens according to claim 1, wherein the plurality of convex mirrors having the same shape collectively reflect all the views beside and behind the plurality of camera lens to the plurality of camera lens.
9. The image acquisition compound lens according to claim 2, wherein the convex mirror is one of a spherical mirror, a parabolic mirror, or a hyperbolic mirror.
10. The image acquisition compound lens according to claim 2, wherein an overlapping region is formed between fields of view reflected by adjacent convex mirrors.
11. The image acquisition compound lens according to claim 2, wherein the plurality of camera lens is a zoom lens.
12. The image acquisition compound lens according to claim 2, further comprising an image electronic processing device connected to the plurality of camera lens.
13. The image acquisition compound lens according to claim 2, wherein the convex mirror has a sector structure with a central angle of 180° or more.
14. A vehicle comprising:
- an image acquisition compound lens, comprising:
- a plurality of camera lens and a plurality of convex mirrors having a same shape, wherein the plurality of camera lens have a predetermined optical view angle and a predetermined front field of view determined according to an optical view angle;
- the plurality of convex mirrors having the same shape are symmetrically disposed within the predetermined front field of view of the plurality of camera lens with respect to an optical axis c of the plurality of camera lens, and configured to reflect partial views beside and behind the plurality of camera lens to the plurality of camera lens respectively;
- a mirror gap is formed between the convex mirrors symmetrically disposed, wherein the mirror lens are configured to directly acquire views within a first front field of view right in front of the mirror lens.
15. The vehicle according to claim 9, wherein the number of the convex mirrors is two.
16. The vehicle according to claim 9, wherein the convex mirror is one of a spherical minor, a parabolic mirror, or a hyperbolic minor.
17. The vehicle according to claim 9, wherein an overlapping region is formed between fields of view reflected by adjacent convex mirrors.
18. The vehicle according to claim 9, wherein the plurality of camera lens zoom lens.
19. The vehicle according to claim 9, wherein the convex mirror has a sector structure with a central angle of 180° or more.
20. The vehicle according to claim 9, wherein the plurality of convex mirrors having the same shape collectively reflect all the views beside and behind the camera lens to the camera lens.
Type: Application
Filed: Dec 28, 2018
Publication Date: Jun 27, 2019
Inventor: Ping YAN (Beijing)
Application Number: 16/234,606